Incontinence detection apparatus having displacement alert

An incontinence detection apparatus for use on a patient bed, the incontinence detection apparatus comprising

• an incontinence detection pad for placement beneath a patient on the patient bed such that the patient lies on the incontinence detection pad without wearing the incontinence detection pad, the incontinence detection pad having a substrate, at least one sensor situated on the substrate, and at least one passive RFID tag that is coupled to the at least one sensor, the passive RFID tag being configured to transmit data via an antenna contained within a boundary of the RFID tag in response to being interrogated, wherein the sensor comprises a moisture detection sensor that extends from the RFID tag beyond a boundary of the RFID tag to detect moisture on the substrate at a position spaced from the RFID tag, the sensor having interdigitated segments that are spaced apart in an open circuit configuration in the absence of moisture and that form a closed circuit configuration in response to moisture bridging between the interdigitated segments for electrical current flow, wherein the incontinence detection pad includes a plurality of substantially parallel fluid migration pathways,
• at least one antenna for emitting energy to interrogate the passive RFID tag of the incontinence detection pad, and
• circuitry coupled to the at least one antenna and providing energy to the antenna to interrogate the passive RFID tag, wherein the circuitry processes the data received from the passive RFID tag by the at least one antenna and initiates a displacement alert if the incontinence detection pad is determined to have shifted so as to be out of position on the patient bed.